diff --git a/libs/ardour/ardour/region.h b/libs/ardour/ardour/region.h
index cde7b24c0c..60a2dec053 100644
--- a/libs/ardour/ardour/region.h
+++ b/libs/ardour/ardour/region.h
@@ -79,6 +79,7 @@ namespace Properties {
 	LIBARDOUR_API extern PBD::PropertyDescriptor<uint64_t>          reg_group;
 	LIBARDOUR_API extern PBD::PropertyDescriptor<bool>              contents; // type doesn't matter here, used for signal only
 	LIBARDOUR_API extern PBD::PropertyDescriptor<bool>              region_fx; // type doesn't matter here, used for signal only
+	LIBARDOUR_API extern PBD::PropertyDescriptor<bool>              region_fx_changed; // type doesn't matter here, used for signal only
 	LIBARDOUR_API extern PBD::PropertyDescriptor<bool>              region_tempo; // type doesn't matter here, used for signal only
 	LIBARDOUR_API extern PBD::PropertyDescriptor<bool>              region_meter; // type doesn't matter here, used for signal only
 };
diff --git a/libs/ardour/audioregion.cc b/libs/ardour/audioregion.cc
index 8817011125..11ebc13dc4 100644
--- a/libs/ardour/audioregion.cc
+++ b/libs/ardour/audioregion.cc
@@ -522,6 +522,7 @@ AudioRegion::set_fade_before_fx (bool yn)
 		if (!_invalidated.exchange (true)) {
 			send_change (PropertyChange (Properties::region_fx)); // trigger DiskReader overwrite
 		}
+		send_change (PropertyChange (Properties::region_fx_changed)); /* EMIT SIGNAL */
 		RegionFxChanged (); /* EMIT SIGNAL */
 	}
 }
@@ -2591,6 +2592,7 @@ AudioRegion::_add_plugin (std::shared_ptr<RegionFxPlugin> rfx, std::shared_ptr<R
 	if (!_invalidated.exchange (true)) {
 		send_change (PropertyChange (Properties::region_fx)); // trigger DiskReader overwrite
 	}
+	send_change (PropertyChange (Properties::region_fx_changed)); /* EMIT SIGNAL */
 	RegionFxChanged (); /* EMIT SIGNAL */
 	return true;
 }
@@ -2621,6 +2623,7 @@ AudioRegion::remove_plugin (std::shared_ptr<RegionFxPlugin> fx)
 	if (!_invalidated.exchange (true)) {
 		send_change (PropertyChange (Properties::region_fx)); // trigger DiskReader overwrite
 	}
+	send_change (PropertyChange (Properties::region_fx_changed)); /* EMIT SIGNAL */
 	RegionFxChanged (); /* EMIT SIGNAL */
 	_session.set_dirty ();
 	return true;
@@ -2633,6 +2636,7 @@ AudioRegion::reorder_plugins (RegionFxList const& new_order)
 	if (!_invalidated.exchange (true)) {
 		send_change (PropertyChange (Properties::region_fx)); // trigger DiskReader overwrite
 	}
+	send_change (PropertyChange (Properties::region_fx_changed)); /* EMIT SIGNAL */
 	RegionFxChanged (); /* EMIT SIGNAL */
 }
 
diff --git a/libs/ardour/region.cc b/libs/ardour/region.cc
index b5cd17f960..c7a6e164ba 100644
--- a/libs/ardour/region.cc
+++ b/libs/ardour/region.cc
@@ -85,6 +85,7 @@ namespace ARDOUR {
 		PBD::PropertyDescriptor<uint64_t> reg_group;
 		PBD::PropertyDescriptor<bool> contents;
 		PBD::PropertyDescriptor<bool> region_fx;
+		PBD::PropertyDescriptor<bool> region_fx_changed;
 		PBD::PropertyDescriptor<bool> region_tempo;
 		PBD::PropertyDescriptor<bool> region_meter;
 
@@ -191,6 +192,8 @@ Region::make_property_quarks ()
 	DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for contents = %1\n",	Properties::contents.property_id));
 	Properties::region_fx.property_id = g_quark_from_static_string (X_("region-fx"));
 	DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for region-fx = %1\n",	Properties::region_fx.property_id));
+	Properties::region_fx_changed.property_id = g_quark_from_static_string (X_("region-fx-changed"));
+	DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for region-fx-changed = %1\n",	Properties::region_fx_changed.property_id));
 	Properties::time_domain.property_id = g_quark_from_static_string (X_("time_domain"));
 	DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for time_domain = %1\n",	Properties::time_domain.property_id));
 	Properties::reg_group.property_id = g_quark_from_static_string (X_("rgroup"));
@@ -1636,6 +1639,7 @@ Region::_set_state (const XMLNode& node, int version, PropertyChange& what_chang
 			fx_latency_changed (true);
 			fx_tail_changed (true);
 			send_change (PropertyChange (Properties::region_fx)); // trigger DiskReader overwrite
+			send_change (PropertyChange (Properties::region_fx_changed));
 			RegionFxChanged (); /* EMIT SIGNAL */
 		}
 	}